Safe-deposit lock.



ATENT OFFICE.

FRANK SOLEY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO Tl-IE MILLERLOCK COMPANY, OF SAME PLACE.

SAFE-DEPOSIT LOCK.

SPECIFICATION forming part of Letters Patent N o. 671,326, dated April2, 1901.

Application filed .Tune 28, 1898. Serial No. 684,674. (No model.)

To all whom it may concern:

Be it known that I, FRANK SOLEY, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented a certain Improvement inSafe-Deposit Locks, of which the following is a specification.

My invention relates to that class of locks known as safe-deposit locks,which require the use of both the custodians key and the renters keybefore they can be opened, the object of my invention being to constructa simple and secure form of such lock in which the retraction andsubsequent projection of the bolt is eifected by a single forwardrotation of the cylinder, which single rotation is l effected partly bythe action of -the custodians key and partly by the action of therenters key, the movement imparted by the custodians key having noeffect upon the unlocking movement of the bolt, the projection of thebolt by backward movement of the cylinder being prevented by the action`of certain stops and the renters key being incapable of removal untilthe complete rotation of the cylinder has been effected and thelocking-bolt projected.

In the accompanying drawings, Figure l is a sectional plan or top Viewof a lock construct-edin accordance with my invention. Fig. 2 is avertical section on the line so Fig. 1. Figs. 3, 4, 5, and 6 aretransverse sections showing the working parts of the lock in differentpositions. Fig. 7 is a front View of the lock, and Figs. 8 and 9 areviews illustrating another embodiment of my invention.

l represents part of the door, and 2 part of the fixed frame, of asafe-deposit structure, the door having on the inside of the same acasing 3, containing a sliding locking-bolt 4, with slot 5 therein, saidbolt being adapted to be projected so as to engage with the fixed frame,as shown in Fig. 1, or retracted, so as to be free from engagement withsaid frame in order to permit of the opening of the door.

Secured to the casing 3, by means of screws 6 or other equivalentfastenings, is a tubular casing 7, which projects forwardly through anopening in the door 1 and has at its forward end an inwardly plQjeCtingannular ange 9, between which and the bolt 4 is 1onvgitudinally confineda cylinder 10, having a ment of the cylinder 10 to effect back-andiforth reciprocation of the locking-bolt. Y

In the cylinder 10 is formed a transverse recess 12 for the reception ofa series of pivoted tumblers 13, which are hung to a pin 14, each ofsaid tumblers being acted yupon by a spring l5, tending to maintain itin cont-act with the cylinder at the front end of the recess 12, asshown in Figs. l and 2,- the tumblers having segmental peripheriesconcentric with the pin 14 and provided with notches for the receptionof lugs 17 upon a pair of dogs 19 and 20, which are located side by sidein the recess 12 and are hung to a pin 2l eX- tending across saidrecess.

Normallythat is to say, when the lock is closed-the parts are intheposition shown in Figs. 1, 2, and 3, both of the dogs projecting into aslot 22 in the tubular casing 7, so that the dog 19 engages with theforward wall of said slot and the dog 2O engages with the rear wall ofthe same, whereby both forward and backward movement ofl the cylinder 10are prevented. When the custodians key is inserted, however, it effectssuch adjustment of the tumblers lying beneath the lug 17 of the dog 19as to bring the notches 16 of said tumblers into line with said lug.Hence said dog 19 is at liberty to swing inwardly when the cylinder isturned forwardly, such inward `movement being caused by the action ofthe forward wall of the slot 22 upon the beveled face of the dog19. Thismovementcontinues until the forward face of the dog 2O cornes IOO v entsuch backward movement. The custodians key being now withdrawn therenters key is inserted, and this effects such adjustment of thetumblers beneath the dog 20 as to bring the notches of said tumblersinto line with the lug 17 of said dog 20, thereby permitting inwardmovement of said dog under the influence of a suitable spring 30, Figi1, so that the dog no longer engages with the forward wall of the slot22. Hence vfurther forward movement of the cylinder 10 is permitted, asshown in Fig. 5. The movement of the cylinder by the action of therenters key continues until the bolt has been fully retracted. Beforethe bolt has been retracted far enough to permit opening of the door,however, the dog 19 has entered a slot 24 in the tubular casing 7, asshown in Fig. 6. Hence the bolt cannot now be projected bya backwardmovement of the cylinder 10, the dog 2O on the continued forwardmovement of the cylinder also engaging with the slot 24 in order toprevent such backward movement. Hence in order to effect the projectionof the bolt and the relooking of the door scontinued forward motion ofthe cylinder 10 must be resorted to until the parts finally again reachthe normal position. (Shown in Fig.

It should be understood that each key is provided 4with one orA morelugs 3l, which when the key is inserted into the lock, so as to elfectadjustment of the tumblers, and the cylinder is turned will engage withthe inwardly-projecting iiange 9 of the casing 7 as soon as saidcylinder begins to turn, so that neither key can be withdrawn until themovement of the cylinder intended to be effected by that key has beencompleted, suitable notches 32 and 33 in the flange 9 providing for theinsertion and withdrawal of the keys at the proper time. Thus thecustodians key is inserted through the notches 32 and withdrawn throughthe notches 33, and the renters key is inserted through the latternotches and withdrawn through the notches 32. Hence after the renter hasinserted his key and has commenced to turn the cylinder 10 he cannotwithdraw the key until he has completed the`movement ofA said cylindersufficient to withdraw and again project the locking-bolt 4. It willthus be seen that in my l improved lock the desired movements of thelocking-bolt are effected by turning the keys always in the samedirectionthat is, forwardly or to the right. Efficientstops are providedfor limiting the forward movement of the custodians key and forApreventing .back movement of the same, and the operation of the bolt bybackward movement of the renters key is also prevented, and as theremoval of said renters key from the lock is rendered impossible until'the bolt has 'first been withdrawn and then again projectedv the doormust be closed and locked by the renter before he can leave it. Hencethe door cannot be left in the unlocked position because of carelessnessor forgetfulness on the part of the renter.

In the modification of myinvention shown in Figs. 8 and 9 the slots 23and 24 in the tubular casing 7 for the entrance of the dogs 19 and 20are dispensed with and a special spring-dog 25 is mountedv in the rearend of the cylinder 10,this dog engaging with notches 26, 27, and 28 inthe casing 7, so as to prevent backward movement of the cylinder fromeither of the positions shown in Figs. 4, 5, or 6. This sameconstruction of dog may be applied with advantage to a cylindercontain-I ing two sets of tumblers of a character similar to those ofthe well-known Yale lock, one set to be adjusted by the custodians keyand Athe other set to be adjusted by the renters key, the dog servingthe same purpose of preventing back movement of the cylinder after ithas been moved forward to a certain extent.

It will be noted on reference to Figs. 3, 4,

5, and 6 that the forward wall of the slot 22 in the casing 7 lof thelock is composed of a plate 35, which is suitably secured in position insaid casing and is composed of steel or other hard metal, so that itsVinner corner will not become worn by the pressure and friction of thedogs upon it to such an extent as to permit a portion of the dog 19 topass beneath it. Hence no such pressure can be brought to bear upon saiddog 19 as would cause its lug to enter, even so little, the notch of `atumbler moved beneath the dog until all of the tumblers are properlyadjusted for the entrance of said lug, thereby preventing the locationof the notches on the part of any one attempting to pick the lock.

Having thus described my invention,I claim and desire. to secure byLetters Patent- 1. A safe-deposit lock having a rotatable carrier withtumblers and dog mechanism, and a casing with stops for said dogmechanism, which stops prevent backward movement of the tumbler-carrierafter the same has been movedso as to retract the bolt, whereby theretraction and projection of said bolt are effected by a single forwardrotation of thetumbler-carrier, substantially as specified.

2. The combination in a safe-deposit lock of the tumbler-cylinder havingtwo sets of tumblers, and two locking-dogs, with stops therefor, one dogoperating in conjunction with one set of tu mblers, and the other dogAoperating in con-junction with the other set of tumblers, substantiallyas specified.

l 3. The combination in a safe-deposit lock of the tumbler-carrier andits tumblers, and a pair of dogs and stops therefor, one dog beingreleased from its stop on one adjustment of the tumblers, and the otherdog being released from its stop on another adjustment of the tumblers,substantially as specified.

4. The combination in a safe-deposit lock, of a cylinder having two setsof notched tumblers disposed side by side and a pairof locking-dogslikewise disposed side by side, one

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of said dogs being adapted to engage with the notches of one set of thetumblers, and the other dog being adapted to engage with the notches ofthe other set of tumblers.

5. A safe-deposit lock in which are combined a single cylinder and twosets of turnblers contained therein, one set adapted to be adjusted byone key, and the other set by another and dilerent key, and mechanismwhereby both sets of tumblers must be adjusted before the lock can beopened.

6. A safe-deposit lock in Which are coinbined a rotatable cylinderhaving tumblers,

Witnesses:

GEORGE L. BATTERSBY, WM. L. LEO.

